17. George H. W. Bush
Photo: David Valdez, The White House / Wikimedia Commons, Public domain
George H.W. Bush served in the Navy until the end of World War II. He then graduated from Yale University and was a member of Delta Kappa Epsilon and the captain of the varsity baseball team. Later after that, he entered the oil business, becoming a millionaire following that, which helped him fund his campaign.
A truly remarkable individual based on those merits alone, George Bush (father), who died in 2018, is credited with an IQ 130, which is high enough to consider him above average when compared to everyone else.